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Glossary term: 星系团

Description: 星系团是由具有引力束缚的星系组成的天体集合。星系团的大小和集中程度各不相同，包含的星系从数百个到数千个不等。例如，离我们最近的室女座星系团就是一个包含数千个星系的大型星系团。除了星系，星系团还包含等离子体和大量暗物质。

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Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher
The translation of this term and its definition is still awaiting approval

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Loose grouping of galaxies with many yellow-ish elliptical galaxies and one priminent spiral galaxy

Fornax Galaxy Cluster

Caption: Galaxies can reside in groups, such as our own local group, or in clusters of galaxies. The Fornax Galaxy Cluster is one of the nearest such large groupings of galaxies. Visible in this image taken by the Very Large Telescope Survey Telescope VST (at the European Southern Observatory in Chile) are elliptical galaxies (without defined structures and in a yellow tint) but also spiral galaxies such as NGC 1365 towards the bottom right. This galaxy in particular is classified as a barred spiral galaxy due to its prominent and well-defined bar. The center of the Fornax Cluster is the giant elliptical galaxy NGC 1399, visible as the largest galaxy on the left of the image.
Credit: ESO. Acknowledgement: Aniello Grado and Luca Limatola credit link

License: CC-BY-4.0 Creative Commons 署名 4.0 国际 (CC BY 4.0) icons

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